Method, device and security system, all for authenticating a marking
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United States of America Patent
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Jun 27, 2006
Grant Date -
Feb 19, 2004
app pub date -
Apr 28, 2001
filing date -
May 16, 2000
priority date (Note) -
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Abstract
A luminescent probe marking is excited with at least one excitation pulse of at least one excitation source. The probe intensity values of emission intensity from emission radiation of the luminescent probe marking are measured in response to the excitation pulse(s) at time intervals. A probe intensity-versus-time emission function is formed of the probe intensity values, and the probe intensity-versus-time emission function is compared with at least one reference intensity-versus-time emission function after the probe intensity-versus-time emission function and the reference intensity-versus-time emission function have been normalized.
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